Electrical question - Nm clamps?

[ps2cho]

Had an electrician install a subpanel now I want to DIY the wiring for a new mini split I am doing.

I ran the wire behind the drywall and fed it through but what are my options to hold the wire going into the box?

It’s against the drywall if that makes sense so to make this work do I really need to remove the entire subpanel from the wall to get a NM romex clamp in to meet code?

Thanks,

 

[Pablo]

Take a picture of the panel hole

 

[ps2cho]

Take a picture of the panel hole

Its in the first post -- the orange 10ga wire is what I just fed through.

 

[burbguy82]

Normally, panels are not fed through the rear, and that is one of the reasons why.

Strain relief is a requirement into any box or panel.

There are several reasons why, what you have is not correct.

In the interest of safety, secure the wire within 6" or the penetration, and use some type of plastic tubing or the like, to shield the romex from the sharp edges of the coupon knockout.

One should not be doing work without a permit, or without some working knowledge of the work, mostly for safety.

 

[Pablo]

Its in the first post -- the orange 10ga wire is what I just fed through.

Duh yeah blame my phone

Disconnect cable and feed a plastic strain relief on and snap in the hole

 

[ps2cho]

Normally, panels are not fed through the rear, and that is one of the reasons why.

Strain relief is a requirement into any box or panel.

There are several reasons why, what you have is not correct.

In the interest of safety, secure the wire within 6" or the penetration, and use some type of plastic tubing or the like, to shield the romex from the sharp edges of the coupon knockout.

One should not be doing work without a permit, or without some working knowledge of the work, mostly for safety.

Got it - the electrician (licensed) when he installed the subpanel told me I could do it that way…guess that’s false.

It’s not wired in so I could knock out one of the tops and go back through the drywall that way? Would that be a better approach?

 

[Rand]

one of these types of bushing with strain relief should work? the one on the left to be exact?

 

[Pablo]

View attachment 274364
one of these types of bushing with strain relief should work?

Yep just what the doctor ordered

 

[Pablo]

Got it - the electrician (licensed) when he installed the subpanel told me I could do it that way…guess that’s false.

It’s not wired in so I could knock out one of the tops and go back through the drywall that way? Would that be a better approach?

No. See our posts. Legal too

 

[ps2cho]

Normally, panels are not fed through the rear, and that is one of the reasons why.

Strain relief is a requirement into any box or panel.

There are several reasons why, what you have is not correct.

In the interest of safety, secure the wire within 6" or the penetration, and use some type of plastic tubing or the like, to shield the romex from the sharp edges of the coupon knockout.

One should not be doing work without a permit, or without some …

Boom! This work??

 

[oil pan 4]

I've always used metal NM connectors, if it goes through the back side of the panel I run RMC so the wire doesn't get sheared off when something shifts.

 

[jhellwig]

Boom! This work??

View attachment 274372

Technically not because it is in backwards. That style is meant to go in from the outside of the box.

I wouldn't loose sleep over it.

 

[factorytuned2012]

Had an electrician install a subpanel now I want to DIY the wiring for a new mini split I am doing.

I ran the wire behind the drywall and fed it through but what are my options to hold the wire going into the box?

It’s against the drywall if that makes sense so to make this work do I really need to remove the entire subpanel from the wall to get a NM romex clamp in to meet code?

Thanks,

View attachment 274354

can you just use a push-in connector or a bushing, has an inspector come out and say they want to see physical strain relief?

 

[ps2cho]

Technically not because it is in backwards. That style is meant to go in from the outside of the box.

I wouldn't loose sleep over it.

Actually realized that a few hours ago -- I ordered the correct ones from Grainger so once they get to the store I'll swap. I still have some time til I have the indoor mini split fan mounted on the wall before I need the breaker in...(whole point of the subpanel install)

 

[ps2cho]

While on the electrical topic, someone confirm this AC Disconnect looks OK?
**note-aware I need to tape the white with black electrical tape to indicate its hot, cant find where I put any of the 5 rolls I had so just getting some more**

I have a clamp on the exit side of the romex going into the wall, so I got that piece on this one.

 

[JHZR2]

What does the NEC say about clamping down wires inside of a panel? That’s the first question.

Otherwise:

View attachment 274364
one of these types of bushing with strain relief should work? the one on the left to be exact?

I’d agree with this as an option.

Alternately, since it’s just a subpanel, can you cut power to it, and then just loosen it from the wall? If so, use an nm clamp with the tightening ring on the outside, and clamp down on the wire from the inside of the panel. Not great, but an option that you could make work.